Gas-meter.



T. JACKSON.

GAS METER.

APPLICATION FILED APR-.3, 1914.

3 5% Patented Jan. 5, 1915.

2 SHEETS-SHEET 1.

KITTY T. JACKSON.

GAS METER. APPLICATION FILED APR. 3 1914. L 1 4m Patented Jan. 5, 1915.

2 SHEETS-SHEET 2.

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NORRIS PETERS 130..PHO7O-LITMOHWASHINGYDN. D. C

t'nrrnn ear ATENT FFl@E.

THOMAS JACKSON, OF NEW CROSS, LONDON, ENGLAND, ASSIGNOB T0 HIMSELF, AND

' ALLAN RAMSAY, O 3 FOLKESTONE, ENGLAND.

GAS-METER.

Specification of Letters Patent.

Patented Jan. 5, 1915..

Application filed April 3, 1914. Serial No. 829,329.

To aZZ whom it may concern:

Be it known that I, THOMAS JAoKsoN, a subject of the King of GreatBritain and Ireland, residing at 7 Milton Court road, New Cross, London,S. E., England, have invented new and useful Improvements in GasMeters,of which the following is a specification.

This invention relates to gas meters and has for its object theconstruction and arrangement of such a device in a simple manner, and atlow cost, and having a high de gree of accuracy.

This invention consists of an expandible and contractible chamber, themoving wall of which takes up an angular disposition during theexpansion and contraction of the chamber which ranges from a angle withthe horizontal line past a point of zero angularity to a angle with thehorizontal line. Upon this moving wall is mounted directly a valvearrangement controlled by gravity during the consequent tilting of thevalve box so that the supply of gas and discharge of it from the saidchamber are alternately efiected. The reciprocating or oscillatingmotion of the said chamber wall is utilized to operate by means of aratchet and pawl arrangement or equivalent device, a counting mechanismregistering the number of reciprocations and consequently the amount ofthe gas passed through the chamher. In order to reduce the error ofregistration or in other words to reduce the lost motion in thetransmission gear, teeth of small pitch are used on the ratchet wheeland multiple pawls having a range of disposition of their engaging edgesequal to the pitch of the teeth are arranged to act on the ratchetwheel. It will be seen that in this way the angular movement of the wallof the chamber and consequently the change of volume of the same can beaccurately transmitted to the counting mechanism.

If only one chamber is used, either gravity or elastic pressure must beemployed as a force against which the gas pressure acts in expanding thechamber in order to cause the chamber to contract when the gas supply iscut oil" and the contained gas is to be delivered for use. If two ormore chambers be used they can be arranged to act one against the otherso that the incoming gas is used directly to force the outgoing gas fromthe device instead of this being done indirectly through the medium ofthe weight of the moving wall and attendant parts.

In order that the invention may be the better understood, I will nowproceed to describe the same in relation to the accompanying drawings,reference being had to the letters and figures marked thereon, likeletters referring to like parts in the various figures in which Figure 1is a view of the simplest form of my invention in which only oneexpanding chamber is used. Fig. 2 is a view of the invention in the formin which two chambers are used combined in one apparatus. Fig. 3 is amodification in which the two chambers are separate from one another butare connected together by co-acting mechamsm.

Referring to Fig. 1 the chamber a is provided with the gravitycontrolled valve and box I) of the form described and illustrated in thespecification of United States Letters Patent No. 1,069,702 to which thesupply pipe 0? and delivery pipe 0 are connected. To the movable wall 6of the chamber a is connected a rod f which is pivoted to the lever gloosely mounted on the axle h of the counting train of the meter. Thelever g pivotally carries one or more pawls j which are adapted toengage with the teeth 70 of the wheel Z. The pitch of the teeth ispurposely shown much greater than would be normally used in order toinsure clearness of illustration. Any reverse motion of the wheel Z onthe return stroke of the lever g is prevented by a series of pawls mwhich are mounted on a fixed pivot and controlled by gravity or otherforce that can be used for the purpose. In order to vary therelationship between the chamber a and the wheel Z adjusting means suchas a slot 12. in the lever g are provided by which the leverage can bealtered.

In Fig. 2 the chamber a: is divided into two parts the top wall of whichrocks about an axis 0 and two sets of rods f, levers g and pawls j areadapted to operate the wheel Z.

In Fig. 3 the chambers a are entirely separate and are adapted tocooperate by means oi a rocking lever 39 pivoted at 9 so that when onechamber is expanding, the other is caused to contract. The action of therocking valve is clearly shown in the sectional part of Fig. 2 by whichthe supply and delivery of the gas is intermittently effected and eachvolume passed through the chamber a is counted by the counting train.

What I claim is 1. A gas meter having in combination an eXpansible andcontractible measuring chamber having a movable Wall, a gravitycontrolled valve for controlling the admission and exit of gas mountedupon the moving wall of the said chamber, a counting mechanism and meansoperated by the said chamber Wall adapted to register each volumetricmovement of the chamber Wall, substantially as described.

2. A gas meter having in combination two measuring chambers having.movable Walls, a gravity controlled valve carried by each chamber, meansadapted to communicate the movement of one chamber Wall to the movingWall of the other chamber, a

I counting mechanism and means by Which the movement of the chamber Wallis transmitted to said counting mechanism, substantially as described.

3. A gas meter having in combination an expansible and contractiblemeasuring chamber having a movable Wall, a g 'avity controlled valve forcontrolling the admission and exit of gas mounted upon the moving Wallof the said chamber, a counting mechanism, means operated by the saidchamber wall adapted to register each volumetric movement of the chamberWall, and means for varying the relationship of the measuring chamberand the counting mechanism, substantially as described.

In testimony whereof I have signcdmy name to this specification in thepresence of two subscribing Witnesses.

THOMAS JACKSON. lVitnesses WVALTER CARVER, DORIS H. HITCHCOCK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C."

